@Min2005
(Hmm... Seems like he doesn't have (made) a forum acc (yet)...)
Why?

If you want to leave a message, make a post to the forum...
My guess is, that
@hidamarisou posted those chapters on his website, but not (yet) on MangaDex.
Checking the
group's info tells me, that:
There should be no problem by uploading those chapters, especially with open upload rights.